
Over the past year, Guilty Dolphin engineered privacy and experimentation features across DuckDuckGo’s privacy-configuration, Android, and content-scope-scripts repositories. They delivered domain-specific mitigations, adwall detection, and robust A/B testing infrastructure, using TypeScript, Kotlin, and JavaScript. Their work included configuration-driven rollouts, feature flag management, and cross-platform telemetry, enabling safer experimentation and rapid iteration. By implementing schema enhancements, automated triggers, and localization, they improved data quality and user experience. Guilty Dolphin’s approach emphasized traceable commits, regression-aware delivery, and risk mitigation, resulting in resilient, maintainable systems that support privacy controls, analytics, and reliable feature deployment across web and mobile platforms.
February 2026: Delivered cross‑platform privacy features, automated actions, and rollout management across multiple repos. Strengthened breakage reporting, dependency management, and test stability, enabling faster iteration and measurable business value.
February 2026: Delivered cross‑platform privacy features, automated actions, and rollout management across multiple repos. Strengthened breakage reporting, dependency management, and test stability, enabling faster iteration and measurable business value.
January 2026 performance summary focusing on delivering high-leverage features, improving data quality, and bolstering resilience across two repositories. Key initiatives include adwall detection and enhanced breakage reporting, an inter-feature communication PoC with an auto-generated FeatureMap and asynchronous initialization, and localization improvements for adwall messages. These efforts reduce reporting gaps, enable safer cross-feature interactions, and provide multilingual support for better user engagement.
January 2026 performance summary focusing on delivering high-leverage features, improving data quality, and bolstering resilience across two repositories. Key initiatives include adwall detection and enhanced breakage reporting, an inter-feature communication PoC with an auto-generated FeatureMap and asynchronous initialization, and localization improvements for adwall messages. These efforts reduce reporting gaps, enable safer cross-feature interactions, and provide multilingual support for better user engagement.
December 2025 monthly summary focusing on feature control and telemetry improvements across two key repos. The team reduced risk by halting ongoing experimental rollouts and expanding AppTP experiment controls, enabling more deliberate decision-making and cleaner feature surfaces. Key actions: - Privacy configuration repo: halted TDS Next Experiment rollouts (Android/iOS/macOS) and AppTP A/A experiment to reduce surface area while decisions are pending. Commits: 8203ccdd9b3c3e93387903afc62d8dc07d918807; 7f6f94025d98081d58d2539421a46137990f0e41. - Android repo: introduced new AppTP TDS experiment toggles and expanded metrics conversion window from 5 to 7 days to improve measurement and decision-making. Commit: c2815d2eeb23fd7a509d89ac5b4b45bdd3f05f29. Impact: - Reduced experimental risk surface across platforms, enabling focused decisions on feature rollouts. - Broadened telemetry coverage for AppTP TDS experiments, supporting more robust analysis and faster iteration cycles. - Demonstrated cross-repo collaboration and clear traceability from commits to business actions. Technologies/skills demonstrated: - Feature flag management and experiment toggling - Telemetry and metrics instrumentation (conversion window adjustments) - Cross-repo coordination, commit hygiene, and traceability - Risk mitigation through controlled feature rollouts
December 2025 monthly summary focusing on feature control and telemetry improvements across two key repos. The team reduced risk by halting ongoing experimental rollouts and expanding AppTP experiment controls, enabling more deliberate decision-making and cleaner feature surfaces. Key actions: - Privacy configuration repo: halted TDS Next Experiment rollouts (Android/iOS/macOS) and AppTP A/A experiment to reduce surface area while decisions are pending. Commits: 8203ccdd9b3c3e93387903afc62d8dc07d918807; 7f6f94025d98081d58d2539421a46137990f0e41. - Android repo: introduced new AppTP TDS experiment toggles and expanded metrics conversion window from 5 to 7 days to improve measurement and decision-making. Commit: c2815d2eeb23fd7a509d89ac5b4b45bdd3f05f29. Impact: - Reduced experimental risk surface across platforms, enabling focused decisions on feature rollouts. - Broadened telemetry coverage for AppTP TDS experiments, supporting more robust analysis and faster iteration cycles. - Demonstrated cross-repo collaboration and clear traceability from commits to business actions. Technologies/skills demonstrated: - Feature flag management and experiment toggling - Telemetry and metrics instrumentation (conversion window adjustments) - Cross-repo coordination, commit hygiene, and traceability - Risk mitigation through controlled feature rollouts
2025-11 monthly summary for duckduckgo/privacy-configuration focusing on cross-platform experimentation and analytics. Key work included TDS Experiment 004 rollout across Android, iOS, and macOS with an initial 25% rollout and a subsequent transition to 100%, while deprecating version 003. This also involved updating control and treatment URLs to improve tracking and analysis. Additionally, App Tracker Protection (ATP) TDS Experiment 002 was enabled for Android (A/A) with URL updates to support robust analytics. No critical defects were reported; the efforts strengthen feature evaluation pipelines, privacy controls, and data quality.
2025-11 monthly summary for duckduckgo/privacy-configuration focusing on cross-platform experimentation and analytics. Key work included TDS Experiment 004 rollout across Android, iOS, and macOS with an initial 25% rollout and a subsequent transition to 100%, while deprecating version 003. This also involved updating control and treatment URLs to improve tracking and analysis. Additionally, App Tracker Protection (ATP) TDS Experiment 002 was enabled for Android (A/A) with URL updates to support robust analytics. No critical defects were reported; the efforts strengthen feature evaluation pipelines, privacy controls, and data quality.
2025-10 monthly summary for the duckduckgo/privacy-configuration repository. Delivered targeted privacy/security safeguards and reduced exposure to experimental features. Focused on small, auditable changes with clear traceability to issues, delivering business value through risk reduction, maintainability, and safer rollout.
2025-10 monthly summary for the duckduckgo/privacy-configuration repository. Delivered targeted privacy/security safeguards and reduced exposure to experimental features. Focused on small, auditable changes with clear traceability to issues, delivering business value through risk reduction, maintainability, and safer rollout.
September 2025 monthly work summary for the duckduckgo/privacy-configuration repository focused on delivering a global rollout of the TDS experiment. The configuration update enables the experiment for 100% of users, aligning measurement conditions and accelerating data collection for A/B testing.
September 2025 monthly work summary for the duckduckgo/privacy-configuration repository focused on delivering a global rollout of the TDS experiment. The configuration update enables the experiment for 100% of users, aligning measurement conditions and accelerating data collection for A/B testing.
Monthly summary for 2025-08 in the duckduckgo/privacy-configuration repository. Delivered updates addressing UI stability and regulatory compliance, with a focus on 25% TDS experiments and tax rule alignment. Achieved concrete bug fix, feature adaptations, and configuration improvements to support A/B testing and regulatory updates.
Monthly summary for 2025-08 in the duckduckgo/privacy-configuration repository. Delivered updates addressing UI stability and regulatory compliance, with a focus on 25% TDS experiments and tax rule alignment. Achieved concrete bug fix, feature adaptations, and configuration improvements to support A/B testing and regulatory updates.
July 2025 — Focus: stability, privacy configuration, and risk mitigation for the duckduckgo/privacy-configuration repository. Delivered two critical bug fixes, reinforced configuration governance, and enhanced privacy controls to reduce risk exposure and improve user trust.
July 2025 — Focus: stability, privacy configuration, and risk mitigation for the duckduckgo/privacy-configuration repository. Delivered two critical bug fixes, reinforced configuration governance, and enhanced privacy controls to reduce risk exposure and improve user trust.
June 2025 monthly summary focusing on key accomplishments across two repositories: duckduckgo/Android and duckduckgo/privacy-configuration. Delivered blocklist expansion to enhance tracker detection testing and boasted cross-repo rollout readiness for June experiments. Achievements include expanding Android blocklist with additional experiment names and enabling targeted feature flags, plus configuration-driven rollout of June 2025 experiments (blocklist enabled at 25% and global TDS rollout). This work strengthens experimentation capabilities, improves detection accuracy, and supports scalable feature flagging with additive changes that preserve existing logic.
June 2025 monthly summary focusing on key accomplishments across two repositories: duckduckgo/Android and duckduckgo/privacy-configuration. Delivered blocklist expansion to enhance tracker detection testing and boasted cross-repo rollout readiness for June experiments. Achievements include expanding Android blocklist with additional experiment names and enabling targeted feature flags, plus configuration-driven rollout of June 2025 experiments (blocklist enabled at 25% and global TDS rollout). This work strengthens experimentation capabilities, improves detection accuracy, and supports scalable feature flagging with additive changes that preserve existing logic.
May 2025 – Monthly summary for duckduckgo/privacy-configuration Key features delivered: - Privacy Configuration Updates for Domain-specific Mitigations: extended and consolidated domain-specific handling for privacy-mitigations across match.com, centerwellpharmacy, td, and nordstrom. Commits: 2cce4163...f, e35e90f5..., 45b8e108..., 39631608... Major bugs fixed: - Restore Login Functionality for News.com.au: mitigated login breakage and restored proper login flow. Commit: 828bb6eb... Overall impact and accomplishments: - Strengthened privacy protections for a broad set of domains, reducing tracking leakage and improving user trust. - Restored reliable login for News.com.au, improving user experience and reducing support risk. - Improved maintainability by centralizing domain-specific mitigation logic for easier future updates. Technologies/skills demonstrated: - Domain-specific privacy mitigation engineering, cross-domain coordination, precise git-based changes, and regression-aware delivery.
May 2025 – Monthly summary for duckduckgo/privacy-configuration Key features delivered: - Privacy Configuration Updates for Domain-specific Mitigations: extended and consolidated domain-specific handling for privacy-mitigations across match.com, centerwellpharmacy, td, and nordstrom. Commits: 2cce4163...f, e35e90f5..., 45b8e108..., 39631608... Major bugs fixed: - Restore Login Functionality for News.com.au: mitigated login breakage and restored proper login flow. Commit: 828bb6eb... Overall impact and accomplishments: - Strengthened privacy protections for a broad set of domains, reducing tracking leakage and improving user trust. - Restored reliable login for News.com.au, improving user experience and reducing support risk. - Improved maintainability by centralizing domain-specific mitigation logic for easier future updates. Technologies/skills demonstrated: - Domain-specific privacy mitigation engineering, cross-domain coordination, precise git-based changes, and regression-aware delivery.
April 2025 monthly summary focused on delivering experimentation capabilities and hardening privacy configurations across two repositories. Key work includes AppTP experimentation support in Android, globalized and precision-tuned exception handling for Adnami within privacy configuration, and targeted Nettavisen mitigation rules to resolve reported issues. These efforts improve business value by enabling data-driven experimentation, increasing privacy-configuration reliability, and reducing user-impacting issues.
April 2025 monthly summary focused on delivering experimentation capabilities and hardening privacy configurations across two repositories. Key work includes AppTP experimentation support in Android, globalized and precision-tuned exception handling for Adnami within privacy configuration, and targeted Nettavisen mitigation rules to resolve reported issues. These efforts improve business value by enabling data-driven experimentation, increasing privacy-configuration reliability, and reducing user-impacting issues.
Concise monthly summary for 2025-03 focusing on key work in the duckduckgo/privacy-configuration repository, including stability improvements for media playback on aointerview.com and fixes to the Play Button, with explicit commit references. Emphasizes business value, impact, and skills demonstrated.
Concise monthly summary for 2025-03 focusing on key work in the duckduckgo/privacy-configuration repository, including stability improvements for media playback on aointerview.com and fixes to the Play Button, with explicit commit references. Emphasizes business value, impact, and skills demonstrated.

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